1 /*

     2  * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 

    27 /*

    28  * The Original Code is HAT. The Initial Developer of the

    29  * Original Code is Bill Foote, with contributions from others

    30  * at JavaSoft/Sun.

    31  */

    32 

    33 package com.sun.tools.hat.internal.server;

    34 

    35 import  java.util.Enumeration;

    36 

    37 import com.sun.tools.hat.internal.model.*;

    38 import com.sun.tools.hat.internal.util.ArraySorter;

    39 import com.sun.tools.hat.internal.util.Comparer;

    40 

    41 /**

    42  *

    43  * @author      Bill Foote

    44  */

    45 

    46 

    47 class ObjectQuery extends ClassQuery {

    48         // We inherit printFullClass from ClassQuery

    49 

    50     public ObjectQuery() {

    51     }

    52 

    53     public void run() {

    54         startHtml("Object at " + query);

    55         long id = parseHex(query);

    56         JavaHeapObject thing = snapshot.findThing(id);

    57         //

    58         // In the following, I suppose we really should use a visitor

    59         // pattern.  I'm not that strongly motivated to do this, however:

    60         // This is the only typecase there is, and the default for an

    61         // unrecognized type is to do something reasonable.

    62         //

    63         if (thing == null) {

    64             error("object not found");

    65         } else if (thing instanceof JavaClass) {

    66             printFullClass((JavaClass) thing);

    67         } else if (thing instanceof JavaValueArray) {

    68             print(((JavaValueArray) thing).valueString(true));

    69             printAllocationSite(thing);

    70             printReferencesTo(thing);

    71         } else if (thing instanceof JavaObjectArray) {

    72             printFullObjectArray((JavaObjectArray) thing);

    73             printAllocationSite(thing);

    74             printReferencesTo(thing);

    75         } else if (thing instanceof JavaObject) {

    76             printFullObject((JavaObject) thing);

    77             printAllocationSite(thing);

    78             printReferencesTo(thing);

    79         } else {

    80             // We should never get here

    81             print(thing.toString());

    82             printReferencesTo(thing);

    83         }

    84         endHtml();

    85     }

    86 

    87 

    88     private void printFullObject(JavaObject obj) {

    89         out.print("<h1>instance of ");

    90         print(obj.toString());

    91         out.print(" <small>(" + obj.getSize() + " bytes)</small>");

    92         out.println("</h1>\n");

    93 

    94         out.println("<h2>Class:</h2>");

    95         printClass(obj.getClazz());

    96 

    97         out.println("<h2>Instance data members:</h2>");

    98         final JavaThing[] things = obj.getFields();

    99         final JavaField[] fields = obj.getClazz().getFieldsForInstance();

   100         Integer[] hack = new Integer[things.length];

   101         for (int i = 0; i < things.length; i++) {

   102             hack[i] = i;

   103         }

   104         ArraySorter.sort(hack, new Comparer() {

   105             public int compare(Object lhs, Object rhs) {

   106                 JavaField left = fields[((Integer) lhs).intValue()];

   107                 JavaField right = fields[((Integer) rhs).intValue()];

   108                 return left.getName().compareTo(right.getName());

   109             }

   110         });

   111         for (int i = 0; i < things.length; i++) {

   112             int index = hack[i].intValue();

   113             printField(fields[index]);

   114             out.print(" : ");

   115             printThing(things[index]);

   116             out.println("<br>");

   117         }

   118     }

   119 

   120     private void printFullObjectArray(JavaObjectArray arr) {

   121         JavaThing[] elements = arr.getElements();

   122         out.println("<h1>Array of " + elements.length + " objects</h1>");

   123 

   124         out.println("<h2>Class:</h2>");

   125         printClass(arr.getClazz());

   126 

   127         out.println("<h2>Values</h2>");

   128         for (int i = 0; i < elements.length; i++) {

   129             out.print("" + i + " : ");

   130             printThing(elements[i]);

   131             out.println("<br>");

   132         }

   133     }

   134 

   135     //

   136     // Print the StackTrace where this was allocated

   137     //

   138     private void printAllocationSite(JavaHeapObject obj) {

   139         StackTrace trace = obj.getAllocatedFrom();

   140         if (trace == null || trace.getFrames().length == 0) {

   141             return;

   142         }

   143         out.println("<h2>Object allocated from:</h2>");

   144         printStackTrace(trace);

   145     }

   146 }